It was 2:00 AM. The accounting department’s legacy thermal label printer—a beast from 2009 that had outlived three servers and two CEOs—had stopped working after a routine Windows 10 update. The error wasn't a normal driver failure. It was a ghost in the firmware.

He forced the install. The screen flickered. The Device Manager tree shuddered. And then, from the accounting closet, a sound like an old friend clearing its throat: the printer’s stepper motor whirred, paper fed through, and a test label spat out:

He selected it. Windows warned him: “Installing this driver may cause instability.” Leo snorted. Instability was already there, dressed as a keyboard.